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Choose from 8 sizes fitting the following flask diameters: 121.776 1-1/4 121.777 1-3/8 121.778 1-3/4 121.779 2" 121.781 2-1/2" 121.782 3" 121.783 3-1/2" 121.784 4" These are button style sprue bases, with various sized center openings. Also called donut style sprue bases. The center opening range from approximately 3/8" for the smallest diameter button style sprue base and go up from there.
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🇺🇸 Ship from USA · On Agora since 2025
$4.50